Wheel bearing on an axle body for vehicles

ABSTRACT

The invention concerns a method for mounting a wheel on an axle housing in the form of an axle tube ( 1 ) for vehicles, in particular commercial vehicles, whereby the wheel is fixed e.g. with wheel bolts to a wheel hub, pivoting on the axle stub ( 2 ) of the axle tube ( 1 ) and the axle stub ( 2 ) is clamped on to an end section ( 3 ) of the axle tube ( 1 ) as a separate component. For simplicity of manufacture and assembly combined with functional durability it is proposed that the end section ( 3 ) of the axle tube ( 1 ) is cylindrical on the inside and has at least one longitudinal slit ( 4 ), that the axle stub ( 2 ) fits into the end section ( 3 ) of the axle tube ( 1 ) with an externally corresponding cylindrical connecting section ( 5 ) and that the end section ( 3 ) of the axle tube ( 1 ) is radially clamped on to the connecting section ( 5 ) of the axle stub ( 2 ) by means of at least one longitudinally continuously split clamping ring ( 6 ) positioned on the end section ( 3 ) of the axle tube ( 1 ).

The invention concerns a method for mounting a wheel on an axle housing in the form of an axle tube for vehicles, in particular commercial vehicles, whereby the wheel is fixed e.g. with wheel bolts to a wheel hub, pivoting on the axle stub of the axle tube and the axle stub is clamped on to an end section (3) of the axle tube (1) as a component.

For passenger vehicles a method is known whereby the axle stub is connected to the other part of the axle housing by means of flange connections. The purpose is to shift the interface between wheel, wheel hub and axle housing, i.e. at the wheel bearing, to a location between the axle stub and the axle housing so that if the brake disc needs replacement, the mounting of the wheel, i.e. the wheel bearing, is not affected, because it never needs to be taken out any more. However, such flange connections are not suitable for the absorption of the considerable forces encountered in commercial vehicles.

It has therefore already been proposed to equip the separate axle stub with a conical connecting section which is clamped by means of an axial screw into an inner cone of the end section opening towards the axle end. However this method of wheel mounting requires considerable manufacturing and assembly effort and can moreover lead to an undesired expansion of the end section of the axle tube.

This invention therefore proposes a wheel mounting of the type described which is simple both from a manufacturing and assembly aspect and at the same time functionally durable.

The invention proposes e.g. that the end section of the axle tube is cylindrical inside and has at least one longitudinal slit, that the axle stub fits into the end section of the axle tube with an externally corresponding cylindrical connecting section and that the end section of the axle tube is radially clamped on to the connecting section of the axle stub by means of at least one longitudinally continuously split clamping ring positioned on the end section of the axle tube.

The cylindrical fit unlike that of conical surfaces is easier to manufacture, functionally durable and simple to undo. In particular it does not result in an expansion of the end section of the axle tube which is additionally prevented by the radial clamping action of the clamping ring. Moreover this wheel mounting can absorb considerably greater forces than the conventional flange connections.

The solution as per invention is particularly advantageous, if the in any case indispensable brake body located on the axle housing, forms the clamping ring i.e. the clamping ring is an integral part of the brake body. In this case the brake body performs a dual function.

Whereas the brake bracket currently in use must be connected with the axle housing by two all round welded connections, application of the invention merely requires attachment (tack-welding) of the brake bracket to the circumference of the axle tube to secure its position. Extensive welding is obviated. The same applies to a separate clamping ring which in any event must be secured in the correct position on the axle tube.

The clamping ring can in the most simple case have a clamping flange traversed by a threaded bolt on either side of the circular slit, whereby the threaded bolt can cooperate with either an internal thread of one clamping flange or with its own nut.

Advantageously the longitudinal slit of the end section of the axle tube and the circular slit align, whereby they both preferably run axis parallel.

For the full utilization of the maximum clamping force of the threaded bolt without subjecting it to bending stress, the clamping flanges can be interconnected at their extremities by a bridge. In this case the clamping path is limited to the elastic range of the material of the clamping ring and the brake bracket.

The longitudinal slit of the end section of the axle tube may at its inside extremity end in a slightly wider round perforation in order to securely limit its longitudinal extension.

To additionally secure the axle stub against axial movement it is e.g. possible to position at least one screw radially on the axle tube, whereby on the axle tube a local reinforcement with an internal thread to receive the screw is fitted and the inside end of the screw engages a continuous slot of the axle stub. The local reinforcements may also constitute the end of the longitudinal slits, they may also be a continuous integral part of the axle tube. The local reinforcement may also be a part of the clamping ring.

In a further development of the invention the extremity of the axle stub is beaded for the axial securing of the wheel bearing. As with the wheel mounting in accordance with this invention it is no longer necessary to remove the wheel bearing, this ensures secure seating of the wheel bearing in the axle stub.

Further aims, features, advantages and applications of the invention are evident from the following description of embodiments with reference to the drawings. All features described and/or pictorially represented, alone or in any combination form the subject of the invention, also independent of their summary in individual claims or their cross-references.

Illustrations:

FIG. 1 An embodiment of the wheel mounting as per invention, partly sectional and broken away

FIG. 2 A view of the axle tube with a longitudinal slit in its end section as per invention

FIG. 3 Frontal view of a brake bracket with a continuous circular slit and radially mountable on an axle tube as per invention.

FIG. 4 Several alternatives for a method for wheel mounting as per invention in representations corresponding to FIG. 1.

As shown in FIG. 1 the wheel mounting as per invention is applied to an axle housing in the form of an axle tube 1 for vehicles, particularly commercial vehicles. With this method of wheel mounting, the wheel (not shown) is attached e.g. by means of wheel bolts (also not shown) to a wheel hub (not shown) pivoting on the axle stub 2 of the axle tube 1. The axle stub 2 is radially clamped on to the end section 3 of the axle tube 1 as a separate component. For this purpose the inside of the end section 3 of the axle tube 1 is cylindrical. The end section 3 has at least one axis parallel longitudinal slit 4. The axle stub 2 fits into the end section 3 of the axle tube 1 with an externally also cylindrical connecting section 5, whereby the end section 3 of the axle tube 1 is radially clamped on to the connecting section 5 of the axle stub 2 by means of at least one longitudinally continuously split clamping ring 6 positioned on the end section 3 of the axle tube 1. In the case illustrated here the clamping ring 6 is an integral part of the brake bracket 10. A threaded bolt 8 cooperating with two eyelike clamping flanges 9, 9, serves to clamp the brake bracket 10 on to the end section 3 of the axle tube 1 and thereby the end section 3 of the axle tube 1 to the connecting section 5 of the axle stub 2. Because of the clamping effect of the brake bracket 10 achieved on the axle tube 1, extensive all round welding of the brake bracket 10 on the axle tube 1 is not necessary. It only requires attachment for positioning, preferably in an area opposite the longitudinal slit 4 so as not to interfere with the clamping of the end section 3.

As can be seen from FIG. 2, the slit 4 of width b ends in a slightly wider round perforation 11 in order to prevent tearing of the longitudinal slit 4.

As can be seen from FIG. 3, the axis parallel longitudinal slit 4 of the end section 3 of the axle tube 1 and the likewise axis parallel circular slit 7 are aligned so that attachment of the brake bracket 10 to the outer circumference of the axle tube 1 does not adversely affect the radial clamping effect.

FIG. 3 also shows that the clamping flanges 9 may be interconnected at their extremities by a bridge 15 to obtain maximum effect the clamping force of the threaded bolt 8.

FIG. 4 shows by way of example that apart from the use of a single clamping ring 6 independent of the brake bracket 10, it is possible to use next to the brake bracket 10 a further clamping ring 6′ mounted at an axial distance from the first on the axle tube 1. As FIG. 5 shows, it is also possible to axially extend the sole clamping ring 6 as a component of the brake bracket 10. Both measures serve to distribute the clamping force over the length of the slit end section 3 of the axle tube 1.

Based on the embodiment in FIG. 6 it is shown that the extremity 12 of the axle stub 2 may be beaded to axially secure the wheel bearing 13. This guarantees that the wheel bearing 13 is permanently secured in its axial position.

An 0-ring 14 may be used to prevent the penetration of moisture between the connecting section 5 of the axle stub 2 and the end section 3 of the axle tube. Furthermore it is possible to provide an anticorrosive coating in that area. All non-welded gaps may also be sealed with a permanently elastic compound after assembly.

FIG. 7 shows an embodiment of a device for securing the axle stub 2 to the end section 3 of the axle tube 1. It consists of a reinforcement 16 welded to the axle tube 1 with a screw 17 inserted in an internal thread, whereby in its security position the inside end of the screw 17 extends into a continuous slot 18 of the axle stub 2 which in the case shown coincides with the area of the widened perforation 11 at the end of the slit 4.

List of Reference Numbers:

-   1 Axle tube -   2 Axle stub -   3 End section of axle tube 1 -   4 Longitudinal slit -   5 Connecting section -   6, 6′, 6″ Clamping ring -   7 Circular slit -   8 Threaded bolt, -   9, 9′ Clamping flange -   10 Brake bracket -   11 Perforation -   12 Extremity of axle stub 2 -   13 Wheel bearing -   14 0-ring -   15 Bridge -   16 Local reinforcement -   17 Securing element (screw) -   18 Slot 

1. Method for mounting a wheel on an axle housing in the form of an axle tube (1) for vehicles, in particular commercial vehicles, whereby the wheel is fixed e.g. with wheel bolts to a wheel hub, pivoting on the axle stub (2) of the axle tube (1) and the axle stub (2) is clamped on to an end section (3) of the axle tube (1) as a separate component, wherein the inside of the end section (3) of the axle tube (1) is cylindrical and has at least one longitudinal slit (4), the axle stub (2) fits into the end section (3) of the axle tube (1) with an externally corresponding cylindrical connecting section (5) and the end section (3) of the axle tube (1) is radially clamped on to the connecting section (5) of the axle stub (2) by means of at least one longitudinally continuously split clamping ring (6) positioned on the end section (3) of the axle tube (1).
 2. Method for mounting a wheel as claimed in claim 1, wherein the clamping ring (6) is a part or else an integral part of the brake bracket (10).
 3. Method for mounting a wheel as claimed in claim 1, wherein the clamping ring (6), in particular if it is an integral part of the brake bracket (10), is e.g. attached by means of tack-welding for positioning on the end section (3) of the axle tube (1).
 4. Method for wheel mounting as claimed in claim 1, wherein the longitudinal slit (4) of the end section (3) of the axle tube (1) aligns with the circular slit (7).
 5. Method for wheel mounting as claimed in claim
 1. wherein the clamping ring (6) has a clamping flange (9) traversed by a threaded bolt (8) on either side of the circular slit (7).
 6. Method for wheel mounting as claimed in claim 5, wherein the clamping flanges (9, 9) are interconnected by a bridge (15).
 7. Method for wheel mounting as claimed in claim 1, wherein the longitudinal slit (4) of the end section (3) of the axle tube (1) ends in a slightly wider round perforation (11) at its inside end.
 8. Method for wheel mounting as claimed in claim 1, wherein one device (16, 17, 18) for securing the axle stub (2) on the end section (3) of the axle tube (1).
 9. Method for wheel mounting as claimed in claim 1, wherein the axle stub (2) is beaded at its extremity (12) for axially securing the wheel bearing (13). 